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数据收集系统是利用人造卫星中继地球环境资料的一种无线电遥测系统。近地卫星(如美国的陆地卫星、泰罗斯-N气象卫星)所属的数据收集系统一般都采取随机取数的方法。在这类系统设计中,电文碰撞规律是涉及到系统容量的重要问题。本文在古典概率的基础上,经适当修改,得到符合计算机模拟结果的理论公式。并提供针对不同系统方案的电文碰撞概率的计算方法。
The data collection system is a radio telemetry system that uses satellites to relay Earth’s environmental information. Near-Earth satellites (such as the US terrestrial satellite, TIROS-N meteorological satellite) belong to the data collection system generally take a random method. In such system design, message collision rules are important issues related to system capacity. On the basis of the classical probability, this paper obtains the theoretical formula which accords with the result of computer simulation after being properly modified. And provide the calculation method for the collision probability of the messages against different system solutions.